The Ducati Diavel Dark Motorcycle ($18,000) just looks mean — a bike you really wouldn't want to mess with. For starters, the all-black paint job makes it look like something that would be at home in the Bat Cave. It has swept-back, sharp lines from the headlight to the tail, and a massive rear Pirelli Diablo Rosso II tire that gives it a stance like it's ready to pounce. It also comes with an engine befitting such an aggressive machine, the Testastretta 11°, which produces 162 hp and 94 lb-ft of torque — plenty to help it leap from traffic light to traffic light.